12263751
Description
Flashcards by Nasteexo Abdirahman, updated more than 1 year ago
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Created by Nasteexo Abdirahman
over 7 years ago
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| Question | Answer |
| What is DNA? |
Deoxyribonucleic acid is the molecule that determines the characteristics of most living things.
Image:
Dna (binary/octet-stream)
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| What are the 3 parts of a nuleitode? | Phosphate Group Deoxyribose sugar Nitrogen-rich base |
| Whta are the four nitrogen bases and how do they complement each other? | Adenine, Thymine, Guanine, Cytosine. They all have different chemical structures and shapes that complement each other. Adenine and thymine complement each other. Cytosine and guanine complement each other. |
| What are chromosomes? | Chromosomes are long, thin, thread-like structures found in the nuclei of all cells in the human body. |
| How many chromosomes, sex chromosomes and autosomes in the human body? | 46 chromosomes(Half from mother and half from father) 2 sex chromosomes(XX and XY) 44 Chromosomes |
| Characteristics of homologous chromosomes. | Have the same length Have a structure called the centromere in the same position Have genes for particular characteristics at the same location along their lengths |
| Where is DNA found? | It is found in the nucleus of cells and is sometimes found in the mitochondria. |
| What are genes? | Genes are sections of DNA arranged along the chromosomes. |
| What is the difference between 1 gene and the next? | Order of bases along the DNA strand Number of bases in that section of DNA |
| What are the proteins used to create the structures and perform the actions needed for cells to survive, grow and function? | Structural, such as collagen and keratin Enzymes such as amylase and lactase Regulatory, such as growth hormone and insulin. |
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